Lantern slide



Feb, 3, 1925.

A. L. MAYER LANTERN SLIDEv Filed April v, 1923 Patented Feb. 3, 1925..

UNITED STATES .PATENT foFFIcE.

ALvIN L. MAYER, oF oNe ISLAND crr'Y, NEW Yoan.

LANmaN SLIDE.

Application led April 7, 1923. Serial No. 630,567.

T all who/mit -may concern.' j

Be it known that I', ALVIN L. MAYER, a

citizen of the United States, vresiding at specihcation.

' chines and commonly the This invention relates to slides for projecting machines, such as magic-lanterns,

stereoscopes,motion picture machines, and

the like, in which pictures, advertisements,

announcements, etc. are printed or otherwise formed on plates Aof glass or other suitable transparent material of proper size for use in the machines. Such slides are now very largely used in motion picture malass plates 'are assembled for the purpose o handling them while in use or during packing or transportation. I

My invention involves frames for the plates which may be quickly made at small cost, may be easily applied t`o the plates, and when so applied will thoroughly protest them from breakage or injury.

In carrying out my invention in one of the preferred ways I forni` the frames of paper or pulp boardhaving portions providing seats for the glass and other yportions which surround the glass and receive fastening devices which securely hold the frame members in place around the glass. In one form of the invention a blank is formed havingtwo similar members connected to ether by a scored part of the blank, eac member having a depression or seat for the glass and a marginal portion shaped to surround the glass and to receive fastening devices. The blank is folded about its scored portion so that one member may be turned over upon the other with similar part of the two -membersin register. Before folding the blank, the glass is placed in the seat of one of the members and when the other member is folded over upon thefirst mentioned. member the glass is completely surrounded by the frame. The

two frame members are formed with open ings preferably of the same size so that a cle'arprojection iield is provided through i' both members. 'Ilhese members may be fastened together in any suitable way.

Other forms of the invention are illustrated in the accompanying drawings and will be hereinafter describe Figure 1 is a front elevation of a lantern slide embodying my improvements.

Figure 2 is a sectional view showing how the glass'plate is held in one form of frame made in accordance with my invention.

Figure 3 illustrates, a blank comprising two frame members made from a single piece' of material and scored in such manner that one member may be folded over upon the other to enclose the glass.

Figures 4 and 5 illustrate on an enlarged scale that portion ofthe blank which is scored and folded.

Figure 6 shows a modification in which one member of the frame is formed with a seat for .the glass while the other member -is iat and has no glass seat or depression.

Figure 7 shows a construction in which one frame member is formed with a glass plate seatwhile theother is not recessed tol receive a glass but has its outer portion bent around the outer edge of the irst mentioned member. Y

f' Figure 8 shows another modification in which one member of the frame is provided with a lseat dee enough to receive the glass plate, while t e other member, which is made integrally with the first mentioned member, is straight and flat but is adapted to be folded over upon the first mentioned member.

In Figure 1 I have shown a lantern slide comprising a transparent plate A and a frame B. It will be observed that a bead a is formed on the frame around the projection opening which not only adds to the earance of the slide but strengthens rame and holds the marginal portions of the frames apart when the slides are acked.

The frame is made of some relative y soft pliable material such as paper board or pulp board instead of being bent or indented to give it the proper form.

Figure 3 shows in section ablank for 'the Jframe before it is bent or folded. In this the seat in this case in the member C being adapted to receive theinner portion only' of the plate. The other member D has s imllar not . marginal edges may be Secured by cement,

staples, or by other fastening devices. Form may be given to the two members by dies or in other suitable ways.

Figures t and 5 illustrate on an enlarged scale parts of the frame members and Figure i indicates how the glass plate is held therein.

In Ifigure 2 a frame construction is shown in which the members @and D are separately formed instead of being joined at .r (Figure 3). Otherwise the construction is tlhe same and the parts are similarly lettered. rJlhe marginal parts c2, Z2 may be secured together by cement, by staples e, or by other suitable devices.

In Figure 6 a further modification is illustrated. In this case one of the frame members Gr is formed with a. seat g for the plate and with a marginal portion g held away from the seat g by a bent part g2 which is of such size as to give the required depth to the seat to receive theplate. 'Ilhe member I-I is a rectangular frame piece having an opening h of the same size as the opening g3 in the member G. rIhe two frame members vmay be fastened in any suitable way.

Figure 7 shows a framev construction in which the member K is formed with a plate seat lo and the member L is formed with an outer portion Z which is bent around the outer edge of the member K and may be ce mented or otherwise attached thereto. It will be understood that the construction of the frame members on all four sides is substantially the same in all cases.

In Figure 8 a further modification is indicated. The member M is similar to the member C in Figure 3, while the member N has no seat for the plate but is joined to the member M at m. Both members may be formed from a single piece of material and the member N may be bent over upon the member M in such manner as to enclose the plate A and to leave a clear projection opening through the slide.

meej/e7 Lantern slides as usually constructed contain two glass plates, one bearing the picture or other object to be projected and the other employed to protect the picture plate. Each of these plates is of standard lantern slide size and the two plates are commonly bound together by passepartout orsimilar material. Slides made in this way are expensive, a large amountot glass ineach slide is used, and the slides are heavy to handle and make transportation charges large. By my improven'ients a single piece of glass is used, thus affording a considerable saving in the material Aand-thisepense is still further decreased by reason of the fact that the glass is of materiallv less areav than tlhe slide as a whole. The single glass plate is thoroughly protected from breakage or injury in handling, packing and transportation and is adapted for use in standaid machines.

I claim as my invention:

l. A lantern slide comprising a transparent plate and a frame therefor consisting oi' two members of standard lantern slide size from edge to edge and which are bent to form oiliset seats or ledges for the edge portions of the plate and surround projection openings in both members, each of said frame members having a marginal portion projecting beyond the edges of the plate and both of said marginal portions being brought close together beyond the edges of the plate and securely fastened. f

2. A lantern slide frame consisting of a single piece of material comprising two members foldable the one `upon the other and each having a projection opening surrounded by an offset ledge providing a plate seat and a marginal portion surrounding the ledge in combination with a transparent plate resting on the ledge.

3. A lantern slide comprising a transparent plate and a frame therefor consisting of two members, each having a projection opening thro-ugh it, one of which members is formed with an offset seat for the plate and a marginal portion and the other member being formed with a part which overlaps the seated part of the plate, liesin contact with the marginal portion of the other member and is fastened thereto.

In testimony whereof, I have hereunto subscribed my name.

ALVIN L. MAYER. 

